Most of the explosions in mines occur due to the mixing of
- Ahydrogen with oxygen
- Boxygen with acetylene
- Cmethane with airCorrect
- Dcarbon dioxide with ethane
Explanation
The correct answer is C because methane, often referred to as firedamp in mining, is a flammable gas naturally trapped within coal layers. When methane is released during mining operations and mixes with the oxygen in the air in concentrations between 5 and 15 percent, it becomes highly explosive. Even a small spark from machinery or static electricity can ignite this mixture, leading to major underground explosions. This is the most common cause of gas explosions in mines.
Related questions
More UPSC Prelims practice from the same subject and topic.
- Prelims 2000GS1science-and-technology
A noise level of 100 decibels would correspond to
- Prelims 2000GS1science-and-technology
A ‘black hole’ is a body in space which does not allow any radiation to come out. This property is due to its
- Prelims 2000GS1science-and-technology
Consider the following features of newer models of motor cars: I. Radial tyres II. Streamlined body III. Multipoint fuel injection IV. Catalytic converter with exhaust Which of these features make the…
- Prelims 2000GS1science-and-technology
Fluorescent tubes are fitted with a choke. The choke coils
- Prelims 2000GS1science-and-technology
When a CD (Compact Disc used in audio and video systems) is seen in sunlight, rainbow like colours is seen. This can be explained on the basis of the phenomenon of
- Prelims 2000GS1science-and-technology
Assertion (A): A man standing on a completely frictionless surface can propel himself by whistling. Reason (R): If no external force acts on a system, its momentum cannot change.